<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        show-icon
        center
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex * 1"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- Tab栏区域 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        label-width="100px"
        :rules="addFormRules"
        label-position="top"

      >
        <el-tabs
          @tab-click="handleTabClick"
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeLeave"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="p"
                  v-for="(p, index) in item.attr_vals"
                  :key="index"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="p.attr_name"
              v-for="p in onlyTabData"
              :key="p.attr_id"
            >
              <el-input v-model="p.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action属性表示要上传图片的URL地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="add_goods" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  created() {
    this.getCateList()
  },
  data() {
    return {
      //步骤条激活的索引
      activeIndex: 0,
      // 添加商品的表单数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        //图片的详情描述
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs:[]
      },
      //校验规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' },
        ],
      },
      //商品分类的数据列表，默认为空
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
      },
      //动态参数列表
      manyTabData: [],
      // 静态属性列表
      onlyTabData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      //图片预览时的url路径
      previewPath: '',
      //预览图片对话框
      previewVisible: false
    }
  },
  methods: {
    //获取商品分类的数据
    async getCateList() {
      const { data: res } = await this.$https.get('/categories')
      if (res.meta.status != 200) {
        this.$message.error('获取商品分类列表获取失败！')
      }
      this.cateList = res.data
      // console.log(this.cateList)
    },
    //级联选择器发生改变时触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //tab栏切换时的钩子函数
    beforeLeave(newValue, oldValue) {
      if (oldValue === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // tab栏被切换时触发
    async handleTabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$https.get(
          `categories/${this.thirdId}/attributes`,
          { params: { sel: 'many' } }
        )
        if (res.meta.status != 200) {
          this.$message.error('获取动态参数失败！')
        }
        console.log(res.data)
        res.data.forEach((items) => {
          items.attr_vals = items.attr_vals ? items.attr_vals.split(' ') : []
        })
        this.manyTabData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$https.get(
          `categories/${this.thirdId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status != 200) {
          this.$message.error('获取静态失败！')
        }
        console.log(res.data)
        this.onlyTabData = res.data
      }
    },
    //预览图片时触发
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //点击×删除图片时触发
    handleRemove(file) {
      //获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      //从pics和数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => {
        x.pic = filePath
      })
      //把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add() {
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTabData.forEach(item =>{
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.onlyTabData.forEach(item =>{
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.att_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // 发起请求添加商品
        const { data:res} = await this.$https.post('goods',form)
        if(res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    //拿到三级id
    thirdId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.previewImg {
  width: 100%;
}
.add_goods {
  margin: 15px 0;
}
</style>